package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;


@Service
@Slf4j
@Transactional
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    //新增菜品
    @Override
    public void save(DishDTO dishDTO) {

        //把菜品赋值
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insertDish(dish);

        //获取insert生成的主键值
        Long dishId = dish.getId();

        //把口味赋值
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){

            flavors.forEach(flavor -> {
                flavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }


    //菜品分页查询

    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {

        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.page(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public void deleteDish(List<Long> ids) {
        //判断当前菜品是否能够删除  -- 是否有启售中的菜品
        ids.forEach(id->{
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                //菜品售出中 不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });

        //判断当前菜品是否能够删除 -- 是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜品数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
        //删除菜品表中的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }
    }

    //user根据分类id查询菜品
    @Override
    public List<DishVO> list(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
